X-Nico

unusual facts about group action



Ak singularity

The product group diff(Rn) × diff(R) acts on Ω(Rn,R) in the following way: let φ : Rn → Rn and ψ : R → R be diffeormorphisms and f : Rn → R any smooth function.


see also

Action civics

Some scholars, such as Chester Finn of the Thomas B. Fordham Institute, argue that Action Civics aims “to turn children into activists” and inappropriately promotes a “communitarian view that issues facing society are best dealt with through group action, by people joining hands and working together rather than through the political process.”